Failed to get driver instance with multiple JDBC connections

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This is a weird one I have run into off late. I had a pipeline with multiple stages. The origin was a Oracle CDC, and the processors were JDBC lookups. There were some jython executors too.

Anyways, for some reason, I wanted to change it's origin from oracle CDC to a replicated Mysql bin log. Now, the moment I add the external library and change the origin to MySQL, the validation on the JDBC processors fail MySQL bin log gets validated just fine, but the JDBC lookups all have the following error:

java.lang.RuntimeException: Failed to get driver instance for jdbcUrl=jdbc:oracle:thin:@connection_URL
    at com.zaxxer.hikari.util.DriverDataSource.<init>(DriverDataSource.java:112)
    at com.zaxxer.hikari.pool.PoolBase.initializeDataSource(PoolBase.java:336)
    at com.zaxxer.hikari.pool.PoolBase.<init>(PoolBase.java:109)
    at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:108)
    at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:81)
    at com.streamsets.pipeline.lib.jdbc.JdbcUtil.createDataSourceForRead(JdbcUtil.java:875)
    at com.streamsets.pipeline.stage.processor.jdbclookup.JdbcLookupProcessor.init(JdbcLookupProcessor.java:144)
    at com.streamsets.pipeline.api.base.BaseStage.init(BaseStage.java:48)
    at com.streamsets.pipeline.api.base.configurablestage.DStage.init(DStage.java:36)
    at com.streamsets.datacollector.runner.StageRuntime.lambda$init$0(StageRuntime.java:211)
    at com.streamsets.datacollector.util.LambdaUtil.withClassLoaderInternal(LambdaUtil.java:148)
    at com.streamsets.datacollector.util.LambdaUtil.withClassLoader(LambdaUtil.java:44)
    at com.streamsets.datacollector.runner.StageRuntime.init(StageRuntime.java:209)
    at com.streamsets.datacollector.runner.StagePipe.init(StagePipe.java:106)
    at com.streamsets.datacollector.runner.StagePipe.init(StagePipe.java:43)
    at com.streamsets.datacollector.runner.Pipeline.initPipe(Pipeline.java:403)
    at com.streamsets.datacollector.runner.Pipeline.lambda$init$0(Pipeline.java:392)
    at com.streamsets.datacollector.runner.PipeRunner.acceptConsumer(PipeRunner.java:221)
    at com.streamsets.datacollector.runner.PipeRunner.forEach(PipeRunner.java:175)
    at com.streamsets.datacollector.runner.Pipeline.init(Pipeline.java:389)
    at com.streamsets.datacollector.runner.Pipeline.validateConfigs(Pipeline.java:216)
    at com.streamsets.datacollector.runner.preview.PreviewPipeline.validateConfigs(PreviewPipeline.java:60)
    at com.streamsets.datacollector.execution.preview.sync.SyncPreviewer.validateConfigs(SyncPreviewer.java:158)
    at com.streamsets.datacollector.execution.preview.async.AsyncPreviewer$1.call(AsyncPreviewer.java:76)
    at com.streamsets.pipeline.lib.executor.SafeScheduledExecutorService$SafeCallable.lambda$call$0(SafeScheduledExecutorService.java:226)
    at com.streamsets.datacollector.security.GroupsInScope.execute(GroupsInScope.java:33)
    at com.streamsets.pipeline.lib.executor.SafeScheduledExecutorService$SafeCallable.call(SafeScheduledExecutorService.java:222)
    at com.streamsets.pipeline.lib.executor.SafeScheduledExecutorService$SafeCallable.lambda$call$0(SafeScheduledExecutorService.java:226)
    at com.streamsets.datacollector.security.GroupsInScope.execute(GroupsInScope.java:33)
    at com.streamsets.pipeline.lib.executor.SafeScheduledExecutorService$SafeCallable.call(SafeScheduledExecutorService.java:222)
    at java.util.concurrent.FutureTask.run(FutureTask.java:266)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)
    at com.streamsets.datacollector.metrics.MetricSafeScheduledExecutorService$MetricsTask.run(MetricSafeScheduledExecutorService.java:100)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
    at java.lang.Thread.run(Thread ...